You should appreciate that there is little point to someone designing a PC, with "bling", for someone else, as what may be "cool" to one person, may be "ugly", or downright ridiculous, to someone else. It's best to design a system, to have the right performance, and sensible, and then "bling" can be added, or, for instance, case changed to something more flashy. I have worked on that basis. The one concession, I have made to "bling", is to use a good Phanteks cooler, that you can get in a variety of colours, if you wish to use a case, with a side window. PCPartPicker part list / Price breakdown by merchant / Benchmarks
I have used a very good case, that you will probably say is boring. I would suggest you pick out a couple of good quality mid-tower ATX cases, that YOU like, and we can say, if one is particularly better. Both Coolermaster (Storm and 690), and NZXT, make (some would say) attractive cases.
I know you said you wanted an EVGA GPU. Whilst the EVGA version is OK, the Gigabyte is better. Of course, if you really want EVGA, you can just swap it in.
When it comes to gaming keyboard/mouse, I would generally say, if you are not sure exactly what you want, the best way is to get a cheap, fairly basic, one, from someone, like Logitech. See how you get on with it. If you don't like it, at least you will know WHAT you don't like, and get a better one, without wasting a lot of money. Better than just getting an expensive one, that someone ELSE likes, and finding you can't get on with it.
Similar thing applies to headsets. How good a one do you want.